Straight brush



FIG. 1 is a perspective view of the straight brush design of the invention;

FIG. 2 is a reduced top view of the straight brush design shown in FIG. 1;

FIG. 3 is a reduced bottom view of the straight brush design shown in FIG. 1;

FIG. 4 is a reduced left side view of the straight brush design shown in FIG. 1, the right side view being a mirror image thereof;

FIG. 5 is a reduced front view of the straight brush design shown in FIG. 1; and,

FIG. 6 is a reduced rear view of the straight brush design shown in FIG. 1. 

The ornamental design for a straight brush, as shown and described. 